Wirelessly posted (Blackberry8700c: BlackBerry9630/4.7.1.40 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/105)
I noticed this as well at LAX. I was able to get a service credit to cover the cost of the overage but I still got stuck for the tax on it since the credit was handled as a separate transaction. Now I find myself booking way over my anticipated return time, at least if I'm returning in below a 24 hour increment in the rental period.